example_spotrs.c File Reference

Example of solving a linear system with a Cholesky factorization. More...

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <plasma.h>
#include <cblas.h>
#include <lapacke.h>
#include <core_blas.h>

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Functions
int	check_solution (int, int, float *, int, float *, float *, int)
int	main ()

Variables
int	IONE = 1
int	ISEED [4] = {0,0,0,1}

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Detailed Description

Example of solving a linear system with a Cholesky factorization.

PLASMA testing routines PLASMA is a software package provided by Univ. of Tennessee, Univ. of California Berkeley and Univ. of Colorado Denver

Version:

2.4.5

Author:

Bilel Hadri

Date:

2010-11-15 s Tue Nov 22 14:35:53 2011

Definition in file example_spotrs.c.

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Function Documentation

int check_solution	(	int	N,
		int	NRHS,
		float *	A1,
		int	LDA,
		float *	B1,
		float *	B2,
		int	LDB
	)

int main

(

)

Definition at line 32 of file example_spotrs.c.

References check_solution(), PLASMA_Finalize(), PLASMA_Init(), PLASMA_slacpy(), PLASMA_splgsy(), PLASMA_splrnt(), PLASMA_spotrf(), PLASMA_spotrs(), PlasmaUpper, and PlasmaUpperLower.

{

    int cores = 2;
    int N     = 10 ;
    int LDA   = 10 ;
    int NRHS  = 5 ;
    int LDB   = 10 ;
    int info;
    int info_solution;

    float *A1   = (float *)malloc(LDA*N*sizeof(float));
    float *A2   = (float *)malloc(LDA*N*sizeof(float));
    float *B1   = (float *)malloc(LDB*NRHS*sizeof(float));
    float *B2   = (float *)malloc(LDB*NRHS*sizeof(float));

    /* Check if unable to allocate memory */
    if ((!A1)||(!A2)||(!B1)||(!B2)){
        printf("Out of Memory \n ");
        return EXIT_SUCCESS;
    }

    /* Plasma Initialize */
    PLASMA_Init(cores);
    printf("-- PLASMA is initialized to run on %d cores. \n",cores);

    /* Initialize A1 and A2 for Symmetric Positif Matrix (Hessenberg in the complex case) */
    PLASMA_splgsy( (float)N, N, A1, LDA, 51 );
    PLASMA_slacpy( PlasmaUpperLower, N, N, A1, LDA, A2, LDA );

    /* Initialize B1 and B2 */
    PLASMA_splrnt( N, NRHS, B1, LDB, 371 );
    PLASMA_slacpy( PlasmaUpperLower, N, NRHS, B1, LDB, B2, LDB );

    /* Plasma routines */
    info = PLASMA_spotrf(PlasmaUpper, N, A2, LDA);
    info = PLASMA_spotrs(PlasmaUpper, N, NRHS, A2, LDA, B2, LDB);

    /* Check the solution */
    info_solution = check_solution(N, NRHS, A1, LDA, B1, B2, LDB);

    if ((info_solution != 0)|(info != 0))
       printf("-- Error in SPOTRS example ! \n");
    else
       printf("-- Run of SPOTRS example successful ! \n");

    free(A1); free(A2); free(B1); free(B2);

    PLASMA_Finalize();

    return EXIT_SUCCESS;
}

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Variable Documentation

int IONE = 1

Definition at line 29 of file example_spotrs.c.

int ISEED[4] = {0,0,0,1}

Definition at line 30 of file example_spotrs.c.